Tool-holder.



J. D. THOMPSON.

TOOL HOLDER.

APPLIOATIGN FILED MAB.. au, 190s.

Patented May 18, 1909.

. .N .MS

INVENTOH JAY D. THOMPSON,

S CL S S M .H W

Y sition in the tool-rest of the machine.

vnance to a minimum.

UNITED STATES PATENT OFFICE.

JAY l). THOMPSON, UF

(TALUMET, M IGHlG/r N.

TOOL-HOLDER.

Application filed latch 30,

To all whom t may concern:

Bre itknown that I, JAY D. THOMPSON, a citiien ol the United States, and a resident of Calumet` in the county of Houghton and Stat-e of Michigan, have invented certain new and useful Imiroveinents in Toolellolders, of which 'the fo lowing is a s ecification.

M invention relates to t iat class of tool hol e'rs which are used on turning and planing machines for metal working where the economical use of tool-steel as a factor in Shop economy is largely practiced which will sup lant the use of large ars of tool steel forme y used with a cutting edge as a cutting tool, and one in which may be inserted a replaceable small piece of tool steel, one of a number of, or set of such ieces adapted, each with a cutting ed e modified to suit the particular kind of wor for which the tool is ada ted, wherein the wear or loss of such smal tools will reduce the holders mainte- My invention hasfor objects to furnish an easy and accessible means for adjusting and fastening the tool used without undue strain tending to shift the holder from its fixed po- With. these and other objects in view my 'invention consists of a taper-headed bolt fitted in an a erture in a suitable frame, and means to e ect the grippin ofthe shank of a tool within said aperturel y the shifting of said tapered bolt.

' My invention consists' further in certain novel features and construction, arrangement and combination of parts as will be hereinafter fully described and pointed out in the claim, reference being had to the accompanying drawings, in which- Figure 1 is an elevation of my improved tool holder. Fig. 2 is a plan view of the same. Fig. 3 is an end view, and Fig. 4 a view of the opposite end. Fig. 5 is a vertical section on line 5-5 ol Fig. 1. Fig. 6 is a verticalsec tion on line 6 6 of Fig. 8. Fig. 7 is an end view of the front plate or member of the frame. Fig. 8 is an elevation and part sec- .tion of the holder with the front memberor plate removed exhibiting the mechanism clamping the tool. Fig. 9 is a top plan view partly in section at one end. Fig. i0 is an end view of Fig. 8, with the adjusting nut or thumb bolt in part section showing inode of attaching thrust plato.

The frame or holder as shown consists of i two members A and B united by screws or i Specification of Letters Patent.

Patented May 18, 1909.

1908. Serial N0. 424,079.

rivets a, the member B being recessed as at b to receive the shoulder portion b of the member A, the two together vforming a close joint. In `the member B is a recess or aperture C one wall e of which is shaped to receive the tapered or wedge shaped end d ofthe bolt D, the other endA of the said aperture being narrowed 'down and having parallel walls to receive the straight end of the bolt; the lower wall e of sai-d a erture is .on a different slant from that o the u per wjalfl e and serves asl a rest for the tool said lower wall extending back of the center of the holder sufficiently far to adapt the aperture to accommodate various lengths of tools and having a shoulder e at `such end thus 'narrowing the aperture `t"osupport the straight end d..of the bolt D which is threaded as shown at g in Fig. 8, to receive a threaded 4,nut l"ormed of the two arts F and F forming an annular groove l in said` nut to receive the fixed late Gr which acts as a thrust bearing in' which the nut swivels to advance and retract the tapered bolt I) to clamp o r release the tool E. The thrust plate G 1s secured to the portion B by means of the screws l. The end ofthe frame 4slotted at J with the thrust late G forms a ocket for the reception. o the collar F `orming part of the thumb nut, said collar being secured to thepart Eby the pins K seated in registering grooves L in the parts F and F such parts so. arranged forming the annular grooves before referred to. The design of the nut, however may be of any other suitable shape if preferred, whereby the adjustment may be made by the im mediate use of the thumb nut or with an ordinary wrench or a hexagonnut.

The shank of tool E is preferably of square crosssection, although it may partake of a wedge shape to assist in the clamping action sought, and the tra er head of D which is usually of rectangu ar cross section may be of any other shapeA if desirable.

H and H are slots right and left handed, in the end of theportions A and B, rovided for the reception of the' bent end of the tool E. Q is the space reserved for the reception of the shank of tools of various lengths.

It will be noticed that the tool E in Fig. 8 held between the 4straight and divergent walls E and E of aperture C, is held with a ve firm grip 'between the jaws formed by sai walls and allows of an exceedingly easy adjustment. With the straight extended end P of tool as shown in Figs. 8 and 9, it is adapted to the use of turning and planing.

In Figs. 1, 2, and 3 the device is ada ted to take a boring tool, the end P being ent and sup orted in the slots I-I and H in A and B 5 t e tool in this form admits the holder passing through carrying the tool point in advance to the full depth of the bore of the piece to be bored. The lower face R of the tapered head d may be milled to more firmly adhere to the tool.

The holder is held fast by means of a suitable rest attached toV the machine carrying the Work to be finished, and the same holder may be used for boring, turning or facing without removal by the interchange of any tool suitable to the Work. The turning tool P may be removed by the shifting of the taper head and the boring tool P inserted in its stead, and secured by the sim le adjustment of the nut F--F. The hol er may be used in an inverted position in the tool rest of the machine, from that shown in the drawings, with the tool also inverted or not.

It is manifest that in carrying out my invention the precise details of structure above set forth may be modified without departing i from the spirit of the invention, and I `do n not wish the invention to be understood as i restricted to such details.

I claim-- A device of the character described, comprising a body portion, a tool and a bolt, l said body portion and tool being provided i with means whereby the Atool may be clamped in the body portion by a longitudinal movement of said bolt, there beingr a recess formed in the rear of the body ortion, a thrust plate, means for securing sai thrust plate to the end of the body portion, a nut threaded upon the rear end of the bolt, said nut comprisin a body portion which lies outside ofthe t rust late, a reduced ortion which passes throug said thrust patel a collar which lies inside of said thrust plate, and means for securing said collar to the reduced portion'of the nut, substantially -as shown and described.

JAY D THOMPSON i W'itnesses: i EVA E. MEYER,

i A. E. PETERMANN. 

